My boyfriend has had this strange thing for many year's now! He get's it only every now and then, but when he does get it, it's horrible.. He only get's this whilst sleeping it wake's him up straight away. As he get's very dizzy, his head spin's, he has to go into the fetal position this strange feeling only last's for 30-60 seconds. He has trouble explaining what exactly happen's to him at this time but i know it freak's him out- and me!
He had it this morning, and he was also feeling sick from feeling so dizzy. We have asked our doctor once before as it's very scarey for him to be woken out of a dead sleep and be so dizzy like his head is going to explode.. The doctor had "no idea" what this could be. He has had it for many year's now, so any help-advice is very welcomed.

Thank's in advance,

worried girlfriend.

Optional Information:
Male, Age: 28

Already Tried:
tried being sick to relieve the feeling, having a bath, eating, sleeping. None of them work.